JPH0929596A - Polisher for knife blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely polish various knife blades having different cutting blades, on the surface of a grinding wheel by downward projecting the lower end of a height adjusting member retractably screwed onto a pedestal body. SOLUTION: In such a case that a cutting blade Sa of a knife S is polished at a polishing angle which is larger than a front end angle (a) of a pedestal body 1, the front end of a height adjusting bolt 4 is projected from a top surface 11 while the lower surface of the knife S is supported a linear front end contour line 11A and a dot-like height adjusting bolt 40, and the upper surface of the knife S is pressed by a fastening screw 3 so as to fix the knife S to the pedestal body 1. Accordingly, the cutting blade Sa of the knife S and a rotary roller 5 are made into contact with an upper grinding wheel surface T so that the cutting blade Sa is polished with a angle larger than the front end angle (a). Thereby it is possible to polish the knife so that this polishing angle is larger than the set front end angle (a) by about ten degrees.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plane blade polishing tool for use in polishing plane blades, chisel blades, etc. for wood processing with a grindstone, and more specifically, a plane blade having various polishing angles. The present invention relates to a plane blade polishing tool that can perform high-precision polishing in response to such situations.

[0002]

2. Description of the Related Art The present applicant previously filed Japanese Utility Model Application No. 37-58539.
No. 1 was proposed, and when a blade edge such as a plane blade or a chisel blade was pressed against the upper surface of a grindstone for polishing, a polishing tool capable of abutting the blade surface with an accurate blade angle was disclosed. This polishing tool is mainly composed of a pedestal body whose longitudinal cross-section is formed in a triangular shape. A fixing mechanism for fixing a plane blade is provided on the upper surface of the pedestal body, and a rotatable rotating roller is provided on the bottom surface of the pedestal body. It is rotatably supported in the direction. That is, the plane blade is placed so as to be in contact with the upper surface of the pedestal body, the plane blade is fixed to the pedestal body diagonally, the blade edge protruding downward from the pedestal body, and the rotating roller are placed on the grindstone upper surface, This is a polishing tool that reciprocates while pressing the pedestal body in the longitudinal direction of the grindstone, and grinds the blade edge protruding at the tip thereof with an accurate grinding angle by the grindstone surface.

In this polishing tool, the tip angle formed by the top and bottom of the pedestal body intersecting each other is set to about 25 degrees, and the blade edge of the plane blade fixed to this polishing tool is polished at this angle. It is also disclosed that when the set tip angle and the polishing angle of the plane blade are different, it can be dealt with by changing the protruding length of the plane blade protruding from the pedestal body.

In this case, when the blade edge angle is larger than the set tip angle, polishing is performed by shortening the projecting length of the plane blade, but when the projecting length of the plane blade is shortened, the tip of the pedestal body is Since it comes into contact with the grindstone, there is a problem that the pedestal body is worn by the polishing. Moreover, there is a limit to how short the length of the plane blade can be projected.Therefore, for plane blades that have a blade edge angle that differs greatly from the tip angle, the above polishing tool cannot be applied, and the blade angle that can be used for polishing is applied. There was a problem that the range was very narrow. Thereafter, various improved polishing tools have been proposed, but none of the polishing tools can be applied to a cutting edge that must be polished at different polishing angles with respect to a preset polishing angle.

[0005] However, Japanese Utility Model Laid-Open No. 5-86451 discloses a device devised so that it can finely polish blades having different blade angles by fine adjustment within a small range. This is because the width of the rotating roller provided on the bottom side is narrowed and it is arranged at the center in the width direction, and the support frame and the pedestal body that pivotally support this rotating roller are configured separately, and they are pushed. It has been proposed that the distance between both members is changed by advancing and retracting the adjusting screw while being biased by a spring so that the upper surface angle of the pedestal body can be changed with respect to the rotating roller.

However, in this technique, there is a big problem that the structure of the polishing tool itself becomes complicated, it takes too much time and cost to manufacture, and the range in which the polishing angle can be changed is narrow, and in the details, the above is mentioned. Since the adjusting screw is installed so as to project to the upper surface side of the pedestal body, there is a problem that the blade itself cannot be applied to long plane blades and chisel blades, and the rotating roller support frame and part of the pedestal body are pushed. Since it is biased and connected by a spring, if the pedestal body is pressed down with a large force during polishing, this push spring will damage and the contact angle between the cutting edge and the whetstone surface cannot be accurately maintained, resulting in high polishing. There is a possibility that inconvenience such as not being performed accurately may be caused.

[0007]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to adapt to various plane blades having a cutting edge angle considerably larger than the tip angle of the pedestal body of the polishing tool and to perform polishing with high precision. To provide. That is, it is possible to polish various plane blades having different blade angles with high precision on the surface of the grindstone by using one polishing tool.

[0008]

The polishing tool of the present invention is for fixing a plane blade on its upper surface and for reciprocating the blade edge on the upper surface of the grindstone while maintaining an accurate angle,
Mainly composed of the pedestal body, on the upper surface side of the pedestal body, a fixing mechanism for fixing this with the plane blade mounted on the upper surface is provided, and on the back side of the bottom surface of the pedestal body. A rotating roller that is rotated by the reciprocating movement of the base body is rotatably supported. That is, only the blade edge of the plane blade and the rotating roller are brought into contact with the upper surface of the grindstone, and the blade edge is polished while maintaining an accurate angle.

In order to achieve a polishing angle set at least at the tip of the pedestal body, sharply intersecting tip angles are formed, and at least this portion is formed to have a triangular vertical sectional shape. The upper surface of this pedestal body is used as a plane for mounting the plane blade. Further, in order to support and fix the plane blade to the pedestal body, a fixing mechanism is provided on the upper surface of the upper surface. In this fixing mechanism, one or more tightening screws are screwed into a support arm fixedly arranged on the pedestal body, and the plane blade is fixed or unfixed on the upper surface by tightening or releasing the tightening screws. It is possible to do this (two tightening screws may be used to penetrate both ends into the pressing plate and move it back and forth to the pedestal body).

The rotary roller is axially supported so that at least a part of its peripheral surface projects from the bottom surface of the pedestal body, and its axis is arranged in a direction orthogonal to the reciprocating direction of the pedestal body. The rotating roller is provided over almost the entire length of the pedestal body in the width direction, a part of the grindstone surface is not unevenly worn, and the rotating roller is configured to accurately rotate and move along the longitudinal direction of the grindstone.

The pedestal body may be made of wood, a metal material, or a synthetic resin material, and the rotary roller is made of wood, a metal material, or a synthetic resin material. Is also good. It is recommended that the pedestal body be made of wood and be inexpensive and easily machined, and the rotating roller should be a metal material such as aluminum or aluminum alloy or chloride that is not easily affected by the water applied to the grindstone. It is desirable to use synthetic resin materials such as vinyl resin and polyethylene.

On the other hand, in the present invention, the tip ridgeline (formed by the intersection of the top surface and the bottom surface) formed at the tip of the pedestal body is arranged parallel to the axis of the rotary roller. That is, when the blade angle of the plane blade is larger than the tip angle of the pedestal body, the plane blade is supported from below by the tip of a height adjusting bolt provided as a height adjusting member to be described later and the above-mentioned tip ridge line. If the cutting edge is not parallel to the axis, the cutting edge is tilted and fixed, and the grinding wheel surface comes into contact with the surface at an incorrect angle, making accurate grinding impossible. Therefore, by disposing the tip ridge and the rotary roller in parallel, the cutting edge accurately abuts the grindstone surface and is ground.

Further, a height adjusting member is provided on the upper surface side of the pedestal body on the back side (closer to the back surface) than the fixing mechanism.
This height adjusting member separates the rear part of the plane blade from the upper surface of the pedestal body and changes the fixing angle between the pedestal body and the plane blade, and the height adjusting member can advance so as to project from the upper surface, It can be completely buried from the top when retreating. A typical example is a combination of a nut member embedded in the pedestal body and a height adjusting bolt screwed into the nut member. That is, when the height adjusting bolt is projected from the upper surface, the lower surface of the plane blade is supported by the height adjusting bolt and the above-mentioned tip ridge line, and the upper surface of the plane blade is pressed by the fixing mechanism that acts from the upper portion of the plane blade. Fixed to the pedestal body.

The height adjusting member is screwed onto the pedestal body from below, not from the upper surface of the pedestal. Therefore, even if the plane blade or the chisel blade is long, the height adjusting member can be reliably supported and fixed to the pedestal body without hitting these plane blades.

On the other hand, as described in claim 2, the action center point of the height adjusting bolt abutting the lower surface of the plane blade is aligned with the center point of the pressing action acting from the upper surface of the plane blade, and fixed. The pressing force by the mechanism acts on the intermediate portion between the ridge line and the position where the height adjusting member is provided, and the plane blade is stably supported and fixed to the base body. That is, when the plane of action is displaced and the plane blade is strongly pressed from above by the fixing mechanism, the support balance is lost and the plane blade is fixed in the vertical or horizontal direction with respect to the base body. Therefore, with the above configuration, the plane blade is supported and fixed to the pedestal body in an accurate posture.

Further, the fixing mechanism comprises a support arm and a tightening screw screwed to the support arm. The support arm is swingably attached to the pedestal body so that the height adjusting member allows the upper surface of the pedestal body to be attached. When part of the plane blade is separated from, the tightening screw is always arranged in the direction orthogonal to the upper surface of the plane blade, and the plane blade is not attached to the pedestal body without the tightening force being inclined. Firmly fix.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. The polishing tool of the present invention is mainly composed of the pedestal body 1, and the pedestal body 1 is formed to have a triangular cross section in the vertical direction, and is formed with a top surface 11, a bottom surface 12 and a back surface 13.
A tip ridgeline 11A is formed at the intersection of the upper surface 11 and the bottom surface 12. Further, the intersection angle between the top surface 11 and the bottom surface 12 is formed as a tip angle a, which is the basic polishing angle of the plane blade.

A gate-shaped supporting arm 2 is extended in the widthwise direction of the pedestal body 1 as a plane blade fixing mechanism at a substantially central portion of the upper surface 11, and both ends thereof are fixed to both side surfaces of the pedestal body 1. It The upper surface 11 is provided at the center of the support arm 2.
The tightening screw 3 that moves back and forth is screwed. A knob 31 is provided on the upper portion of the tightening screw 3, and a fixing metal fitting 32 that is swingable and rotatable with respect to the tightening screw 3 is provided on the lower portion thereof. That is, the plane blade S is sandwiched between the upper surface 11 and the fixing metal fitting 32, and the plane blade S is tightened by the tightening screw 3 to fix the plane blade S to the pedestal body 1. The support arm 2 may be swingably attached to the pedestal body, so that when the angle of the plane blade is changed as described later, the tightening screw 3 is always pressed against the plane blade at right angles. be able to.

Further, on the back side of the bottom surface 12 of the pedestal body 1, a groove portion 14 is formed along the width direction of the pedestal body 1, and a rotary roller 5 rotatably supported by a support shaft 51 is provided inside the groove portion 14. Provide along almost the entire length of the direction. At least a part of the peripheral surface of the rotating roller 5 is the bottom surface 12
It is arranged so as to project downward from. The rotating roller 5
The axis Cr of is arranged in parallel with the tip ridgeline 11A.

A height adjusting bolt 4 as a height adjusting portion is screwed into the substantially central portion of the rear surface 4 so as to be orthogonal to the upper surface 11. The height adjusting bolt 4 is screwed into a nut member 41, and the nut member 41 is embedded and fixed in the base body 1. The tip of the height adjusting bolt 4 can be projected from the upper surface 11 and can be completely retracted to a lower portion of the upper surface 11. The tip of the height adjusting bolt 4 is arranged on a straight line with the center of the pressing action of the tightening screw 3.

Preferably, the center line C in the width direction of the pedestal body 1
The tip of the height adjusting bolt 4 and the center point of the tightening screw 3 are arranged on m. Therefore, the width direction center line Cm is orthogonal to the axis Cr of the rotating roller 5. Further, the lower end of the height adjusting bolt 4 is formed with a turning recess such as a cross shape or a letter shape or a hexagonal outer shape, and the lower end is the rear surface 1.
3 is projected.

The tip angle a at which the top surface 11 and the bottom surface 12 of the pedestal body 1 in FIG. 1 intersect is the same as the cutting edge angle a0 of the tip of the plane blade S, the cutting edge angle a0 is the same as the grinding angle, and the grindstone upper surface T Thus, the cutting edge Sa is polished to the same angle as the tip angle a. That is, the cutting edge Sa projected from the pedestal body 1 and the rotary roller 5 contact the upper surface of the grindstone, and the pedestal body 1 is manually reciprocated in the front-rear direction (the left-right direction in FIG. 1) to reciprocate the blade edge Sa at a predetermined set angle. (Tip angle a = blade angle a
Polish to 0). It is preferable that the set angle is arbitrarily set within the range of 3 degrees before and after with 25 degrees as the center.

FIG. 3 is a side view showing a case where the blade edge Sa of the plane blade S is polished at a polishing angle smaller than the tip angle a of the pedestal body 11. By extending the length of the plane blade S protruding from the tip ridgeline 11A of the base body 1 to support and fix the plane blade S on the base body 1, the bottom surface 12 of the base body is inclined with respect to the upper surface T of the grindstone, and the rotary roller 5 and the cutting edge Sa are brought into contact with the upper surface T of the grindstone. At this time, the height adjusting bolt 4 is retracted and is not used. This polishing angle a1 can be polished at a polishing angle smaller than the set tip angle a by about 10 degrees. At this time, the base body 1 is not in contact with the upper surface T of the grindstone.

FIG. 4 is a side view showing a case where the blade edge Sa of the plane blade S is polished at a polishing angle larger than the tip angle a of the pedestal body 1. The tip 40 of the height adjusting bolt 4 is projected from the upper surface 11, the lower surface of the plane blade S is supported by the linear tip ridge line 11A and the tip 40 of the dot-shaped height adjusting bolt, and the upper surface of the plane blade S is tightened. Pressing with the screw 3 to the pedestal body 1
Is fixed.

As a result, the blade tip S of the plane blade is attached to the upper surface T of the grindstone.
The a and the rotating roller 5 are brought into contact with each other, and the cutting edge Sa is ground at an angle larger than the tip angle a. This polishing angle a2 can be polished at a polishing angle larger than the set tip angle a by about 10 degrees. At this time, the plane blade S is supported by the linear tip ridgeline 11A over the entire length in the width direction of the plane blade, so that the plane blade S can be securely fixed to the base body 1. Further, since the rotating roller 5 and the tip ridge line 11A are arranged in parallel, the pedestal main body 11 can reciprocate in the direction perpendicular to the roller axis accurately, and the cutting edge Sa does not obliquely contact the upper surface of the grindstone. Polished with high precision. Furthermore, the tip ridgeline 11
Since A does not come into contact with the upper surface T of the grindstone, the tip ridgeline is not worn as in the case of polishing a plane blade having a cutting edge angle smaller than the tip angle. The tip 4 of the height adjustment bolt 4
The zero may be formed in a hemispherical shape so that the tip and the plane blade are brought into contact with each other without rattling.

FIG. 5 is a vertical cross sectional view showing another embodiment of the present invention. A metal cover 11b is attached to the tip ridgeline 11A portion of the pedestal body 1 so as not to be deformed even when the plane blade S is strongly contacted. Further, a concave portion 15 is formed on the back side of the upper surface 11, and a holding metal fitting 43 is formed inside the concave portion 15.
To be buried and stored. The pressing fitting 43 is formed so that the upper end thereof is in close contact with the flat surface,
The lower part of the metal fitting 43 has a recess 42 at the tip of the height adjusting bolt 4.
It is attached to be freely rotatable and swingable.

That is, the plane blade placed on the upper part of the press fitting 43 is firmly supported by the height adjusting bolt 4, and the pressing force to the plane blade by the tightening screw (not shown) attached to the support arm is surely secured. receive. Further, since the lower portion of the height adjusting bolt 4 is projectingly provided in the space 16 formed inside the pedestal body 1, and no extra substance is projected to the outside of the pedestal body 1, the pedestal body 1 can be held by hand. Can be easily grasped.

FIG. 6 is a partially cutaway explanatory view showing another embodiment of the height adjusting member according to the present invention. Height adjustment bolt 4
Is screwed into a nut member embedded in a part of the pedestal body, and the tip thereof is recessed between the two protrusions 44, 44.
And the recess 42 is fitted into the hole formed in the bottom surface 61 of the vertical movement member 6. This makes the height adjustment bolt 4
The vertical movement member 6 can be moved up and down by rotating. The vertical movement member 6 is fitted in a groove-shaped guide hole 15a formed in the pedestal body 1 so as not to move in the width direction (generally left-right direction in the drawing) and the length direction (generally up-down direction in the drawing). Composed. Therefore, when the height adjusting bolt 4 is moved back and forth, the vertical movement member 6 is regulated so as not to move in these directions, but the vertical movement member 6 moves up and down accurately in the arrow direction.

As shown in FIG. 6, it is preferable that the upper and lower parts of the vertical moving member 6 are curved into a semicylindrical shape.
As a result, the plane blade placed on this can be firmly supported by being linearly abutted in the width direction regardless of the advancing height of the height adjusting bolt 4, and will not be displaced.

[0030]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, not only can the blade edge of a plane blade be precisely ground to a set polishing angle corresponding to the tip angle of the pedestal body, but it is also larger than the above-mentioned tip angle. The blade edge of the plane blade can be highly accurately polished at any angle with respect to both the angle and the small angle. Further, since the polishing tool of the present invention has a simple structure, it can be manufactured at low cost in a short time without wasting time and cost in manufacturing. Further, even if the pedestal body is strongly pressed against the grindstone surface by hand, it does not distort, and the plane blade attached to the pedestal body reliably moves back and forth on the grindstone surface to achieve highly accurate polishing.

[Brief description of drawings]

FIG. 1 is an explanatory side view showing an embodiment of the present invention.

FIG. 2 is an explanatory plan view of FIG. 1;

FIG. 3 is an explanatory view of a usage state of the embodiment shown in FIG.

FIG. 4 is an explanatory view of another usage state of the embodiment shown in FIG.

FIG. 5 is a vertical cross-sectional explanatory view showing another embodiment of the present invention.

FIG. 6 is a partially cutaway explanatory view showing another embodiment of the present invention.

[Explanation of symbols]

 1 pedestal body 2 support arm 3 tightening screw 4 bolt 5 rotating roller 11 upper surface 12 bottom surface 13 rear surface S plane blade Sa blade edge

Claims (2)

[Claims] 1. A pedestal body has a triangular cross section in a longitudinal direction, an upper surface, a bottom surface and a back surface are formed, a plane blade fixing mechanism is provided on an upper side of the upper surface, and the bottom surface extends in a width direction of the pedestal body. A rotary roller is rotatably provided along at least a part of the peripheral surface of the rotary roller so as to project from the bottom surface, and a plane blade is sandwiched and fixed between the upper surface and a fixing mechanism. A tool for polishing a plane blade, which reciprocates the blade edge and the rotating roller by contacting them on a grindstone surface, wherein a tip ridge line formed by the upper surface and the bottom surface is formed parallel to the axis of the rotating roller, At the back side of the fixing mechanism in, the height adjusting member of the plane blade projecting or retracting from this upper surface is screwed to the pedestal body so as to be able to move forward and backward, and the lower end of this height adjusting member is provided so as to project downward. A plane blade polishing tool. 2. The fixing mechanism comprises a support arm and a tightening screw screwed to the support arm, the support arm is swingably attached to the pedestal body, and the height adjusting member is a height adjusting bolt. The nut member is screwed into the height adjusting bolt, and the nut member is embedded and fixed in the pedestal body. The tip of the height adjusting bolt and the force acting center point of the tightening screw are arranged on a straight line. The plane blade polishing tool according to claim 1, wherein the virtual line is arranged so as to be orthogonal to a tip ridgeline formed by the upper surface and the bottom surface of the pedestal body.